body {
    background-color: #cceeff;
}

/* 加粗 */
.cu {
    font-weight: 700;
}

.main {
    background-color: #0d1117;
    color: #c9d1d9;
    padding: 20px;
    border: 1px solid rgba(0, 0, 0, .125);
    border-radius: .25rem;
    font-size: 16px;
}

.main h1 {
    margin: 0px 0px 16px;
    padding: 0px 0px 9.6px;
    line-height: 1.25;
    font-size: 32px;
    border-bottom: 1px solid rgba(255, 255, 255, .125);
}

.main p {
    margin: 0px 0px 16px;
}

.main .head {
    margin: 15px 0;
}

.main h2 {
    margin-top: 40px;
    margin-bottom: 20px;
    padding: 0px 0px 8px;
    line-height: 1.25;
    font-size: 24px;
    border-bottom: 1px solid rgba(255, 255, 255, .125);
}

.main p a {
    color: #58a6ff;
}

.main p a:hover {
    text-decoration: underline;
}